The starting distance wouldn't allow either combatant to use the force offensively, so this contest would be decided by their skill with the blade.
So I'm just using this quote:
And we know that Vader is the best duelist with a red lightsaber, which puts him > Apprentice Sidious. Apprentice Sidious actually trained with a lightsaber, while DE Palpatine barely touched his lightsaber in decades.
So, Kyle <= Ben = Vader > Apprentice Sidious >> DE Sidious.
Katarn takes this.
Edit: Actually not sure how the VotJ would affect the fight though, tbh.
Yeah, Kyle would be the one to draw easier on the VotJ nexus given his prievous experiences. He legit actually wins kek.
__________________
They are angry because they have been forced to recognize that their hour has arrived; that the time has come to surrender power to Shimrra and the new order."
FotJ Kyle might win, but VotJ Kyle loses. Then again because Sidious was retconned into having skills by RotS, he is likely a terrible duelist in reality by DE, which might seal the win for him since he would simply open with Force storms, distracting Kyle long enough for him to punch him through the chest, because we saw in Darth Plagueis that Darth Plagueis could punch through armoured torsos even while having his trachea cut and two failing hearts so we can imagine that by DE Sidious would have the punching power of ancientpower's bleeding pussy.
__________________ “The galaxy must experience the pain of death and the rapture of rebirth as I have. I will bring chaos. It is time for war.”